From 6882a04fb36642862b11efe514251d32070c3d65 Mon Sep 17 00:00:00 2001
From: Konstantin Tokarev <annulen@yandex.ru>
Date: Thu, 25 Aug 2016 19:20:41 +0300
Subject: Imported QtWebKit TP3 (git b57bc6801f1876c3220d5a4bfea33d620d477443)

Change-Id: I3b1d8a2808782c9f34d50240000e20cb38d3680f
Reviewed-by: Konstantin Tokarev <annulen@yandex.ru>
---
 Source/JavaScriptCore/heap/CopiedBlock.cpp | 94 ++++++++++++++++++++++++++++++
 1 file changed, 94 insertions(+)
 create mode 100644 Source/JavaScriptCore/heap/CopiedBlock.cpp

(limited to 'Source/JavaScriptCore/heap/CopiedBlock.cpp')

diff --git a/Source/JavaScriptCore/heap/CopiedBlock.cpp b/Source/JavaScriptCore/heap/CopiedBlock.cpp
new file mode 100644
index 000000000..13798a198
--- /dev/null
+++ b/Source/JavaScriptCore/heap/CopiedBlock.cpp
@@ -0,0 +1,94 @@
+/*
+ * Copyright (C) 2015 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ */
+
+#include "config.h"
+#include "CopiedBlock.h"
+
+#include "JSCInlines.h"
+
+namespace JSC {
+
+static const bool computeBalance = false;
+static size_t balance;
+
+CopiedBlock* CopiedBlock::createNoZeroFill(Heap& heap, size_t capacity)
+{
+    if (computeBalance) {
+        balance++;
+        if (!(balance % 10))
+            dataLog("CopiedBlock Balance: ", balance, "\n");
+    }
+    CopiedBlock* block = new (NotNull, fastAlignedMalloc(CopiedBlock::blockSize, capacity)) CopiedBlock(capacity);
+    heap.didAllocateBlock(capacity);
+    return block;
+}
+
+void CopiedBlock::destroy(Heap& heap, CopiedBlock* copiedBlock)
+{
+    if (computeBalance) {
+        balance--;
+        if (!(balance % 10))
+            dataLog("CopiedBlock Balance: ", balance, "\n");
+    }
+    size_t capacity = copiedBlock->capacity();
+    copiedBlock->~CopiedBlock();
+    fastAlignedFree(copiedBlock);
+    heap.didFreeBlock(capacity);
+}
+
+CopiedBlock* CopiedBlock::create(Heap& heap, size_t capacity)
+{
+    CopiedBlock* newBlock = createNoZeroFill(heap, capacity);
+    newBlock->zeroFillWilderness();
+    return newBlock;
+}
+
+void CopiedBlock::zeroFillWilderness()
+{
+#if USE(JSVALUE64)
+    memset(wilderness(), 0, wildernessSize());
+#else
+    JSValue emptyValue;
+    JSValue* limit = reinterpret_cast_ptr<JSValue*>(wildernessEnd());
+    for (JSValue* currentValue = reinterpret_cast_ptr<JSValue*>(wilderness()); currentValue < limit; currentValue++)
+        *currentValue = emptyValue;
+#endif
+}
+
+CopiedBlock::CopiedBlock(size_t capacity)
+    : DoublyLinkedListNode<CopiedBlock>()
+    , m_capacity(capacity)
+    , m_remaining(payloadCapacity())
+    , m_isPinned(false)
+    , m_isOld(false)
+    , m_liveBytes(0)
+#ifndef NDEBUG
+    , m_liveObjects(0)
+#endif
+{
+    ASSERT(is8ByteAligned(reinterpret_cast<void*>(m_remaining)));
+}
+
+} // namespace JSC
-- 
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